Magneto or dynamo electric machines



(No Model.)

BEST AVAILABLE COP Z. T. GRAMMB.) GOMMUTATOR FOR MAGNETO 0R DYNAMIOELECTRIC MAGHINES.

2 Sheets-Sheet l.

(No Model.)

BESTAVAlLABLE COP" z. T. GRAMME. UOMMUTATOR FOR MAGNETO OR DYNAMOELECTRIC MACHINES.

Patgnted Mar. 4, 1884.

2 Sheets-Sheet 2.

Inventor 'Witnes-s es" UNIT D. STATES BEST AVAILABLE cop TTATENT OFFICE.

'zi inonn THEOIHILE RAMME, or PARIS, FRANCE.

' COMMUITAITDR roa MAGNETO R DYNAMO ELECTRlC MACHlN Es.

SPECIFICATION forming part of, Letters Patent No.-294,613, dated March4, 1 884.

i I application filed December is. 1883. -(No model.)

To all whom" it 'ntay' concern.-

- Be it known that I, ZI'JNOBE Tn'iiormnn Gunman, acitizenofFr'ance,residing at Paris,

in the Department'of the Seine, have invented newand useful ImprovementsinOommu'tators of Magneto and Dynamo Electric Machines, of

which the following is a specification.

This invention relates to mechanism formoving the commutator brushes orrubbers into and out of contact with the sections or bars of thecommutator-disk, and generally for regulating the position of thebrushes. It

hasmore particular reference to machines of theGrainme type havingseveral (two or more) pairs of poles and corresponding pairs of brushes;the mechanism being adapted to move all the'brushes in and outsimultaneously; but it may be applied to other machines. .It consists in.the combination, with the sockets or carriers for the brushes, of acom- J mon support with which said sockets or carriers are movablyconnected, and operating devices also carried by a common support forsimultaneously shifting said sockets or carriers. Preferably the socketsor carriers are pivoted or hinged sons to move in circular arcs; butother connection which permits to them movements adapted to bring thebrushes into or withdraw them from contact with the commutator-disk maybe used. The operating devices also may be of any suitable kind,

preference being given, however, to pins work'- the other, therebyoperating upon all the sockctsor carriers equally and simultaneously.

The invention also consists in the n'seof rings or disks for one orboth-the common supports above referred to; and it'fu'rther comprisescertain special constructions and combinations hereinafter set forth.

The accompanying drawings illustrate what is considered the best mode ofapplying the principle of the invention.

Figure 1 isa simplified elevation of a commutator embodying theinvention, or part thereof, and adapted to use in a six-pole mava tion,vertical longitudinal section, and plan the commutator of a t\'velve'-pole machine, and ill ustrate' more fully details of construction.

gether by a screw, a. Th ey are attached to the machine frame, fromwhich they are also insulated. They constitute the common supsockets Gare hingedor pivoted to the ears b of the: ring A, and the sockets D tothe ears 0 of the ring B. The. sockets O carry the brushes of one sign(saythe positive brushes) and the sockets D those ofopposite sign,(or'negative brushes.) The sockets or brush-carriers are eachmechanically connected with an arm of a star-wheel, E, by means of apin, d','on the arm, which engages a slot, 6, on the carrier. Thesockets or'carriers are suitably insulated from the star-wheel. Thelatter is mounted on a boss, on which it can be turned by means of thehandle F. The rings A B being stationary, when the star-wheel is turnedin one .direction' to the right, as shown, it moves all the sockets orcarriers G Dsimultaneously, so as to press the ends of thebriishesagainst the -posite direction, it moves them out of contact. =Apin,f, in a slot, 9, in the. handle the play of the latter.

Instead of using two rings, A B, it is evident that one could. be used,provided the .sockets or carriers be properly insulated there from;also, that the machine-frame itself could be used to support the socketsor carriers. It 'is further evident that by making the star-.

two parts, insulated from each other, it would .riers from said wheel orsupport.-. Thisarwith those of Fig. 1. Thus the rings cran nular platesA B are fastened together by the screws: a, but are insulated from eachother, and constitute the common support to the Referring to Fig. 1, A Bare two metal rings insulated from each other, but, fastenedtocommut-ator-disk G. hen turned in the op' wheel or support forthe-operating devicesdinl rangcment, which has some advantages, isvshown in Figs. 2, 3, and 4, in which the parts are lettered tocorrespond asnear 'a'sn' ay'bebrush sockets or carriers C D, the socketsQ- chine. Figs. 2, 3, and 4. represent in end eleport to the brushsockets or carriers OD. The

F limits not be necessary to insulate the sockets-or cartoo 4 adjustmentnot exceeding the length of the L, which projects upward from and isattached REST AVAILABLE COP effect will be to shift simultaneously-allthe brush sockets or carriers 0. D, so as to bring the brushes into. or.out of contact with the commutator-disk G; or't'o increase or decreasethe pressure of the brushes against-said comnmtator-disk." When the,plates A B are adjusted or turned 'aroundthe 'i,"th e plates E Efl'beingconnected with them through the screw or. worm 1?,{are of coarseadjusted or turned with them;

It is evidentthat'ui in details'withoutzdepartingijfroin the spirit ofthe invention, and thatpartsof-thenvent n maybe used separately,

for the positive brushes being hinged to the cars b of plate A, andthose I) for the megative brushes to the ears 0 of plate B. The plate Aprojects inward "beyond the plate B, and is fastened to the hub H by thescrews h', but is insulated therefrom. The hubH sur rounds and isadapted to turn upon a station-- ary boss, 1', which forms apart of thej ournalbearing of the armature-shaft I. The plate A is provided withaproj ection, it, into the end of which is tapped a bolt, K. This boltpasses through a curved slot, 1, in the stationary arm to thejo'u'rnalwbearing. By thisbolt theplates A B, with their hub H, can beheld stat onary 'henever desired, while at the same time an slot can behad by loosening the bolt. This adjustment is an improvement 'omitted,for the sake of. simplicity, in Fig. 1. It enables the position of thebrushes to be adjusted with respect to the neutral and maximum points ofthe commutator-disk. The construction further enables the brushes to beset uniformly in their sockets or carriers 0 l), for, by removingthebolt Kthe plates A B'can be or carriers and the common}suppontithenefor, of the devices forshiftingthe,,-saidso:ckets orcarriers and the" common supportforaid 1 vices-substantially asdescribed: 3

2. The combination, with twojor more pairs of commutator-brushes, ofmechanism, sub-' stantiallyas" described, -for simultaneously movingsaidrushes into and-out of contact with the commutator-disk, aslsetl forth.

3. The combination, carriers, movable to bring the commutatorbrushesinto and-out of contact with the co nmutator-disk, of a ring or platemovable around the axis of said disk, and connected with said sockets orcarriers to shift the same,

or carrier coming successively into the same position, the brushes canbe set so as to touch the commutator at the same point precisely.

The devices for simultaneously movingthe brushes into and out of contactand the support therefor are turned with the platesA B I and hub H. Thissupport consists of two ansubstantially as described. nular plates orrings, E E. These are fast- 4-. In combination with the brush sockets orened together by screws m, but are insulated from each other, and heinner plate or ring,. E is fastened to the hub M by screws a, but isinsulated from it. The hub M'is capable of turning on-the boss 13. Theplates or rings E E being fastened directly or indirectly to ...e hub,thelatterturns with it. The pins (2, which act upon the brush sockets orcarriers, are carried by projections of the two plates or rings, thepinsforacting upon the sockets or carriers G by the plate or ring E, andthose for acting upon the sockets or carriers D by the plate or ring Themeans for moving the support E E carriers, plates fastened together butinsulated from each other, and connected, respectively, with sockets orcarriers of unlike sign, substantially as described. 5. The combination,with the brush sockets or carriers, of the'two supports connected withsaid sockets or carriers, said supports being movable with respect toeach other to move the brushes toward and away from the commutator-disk,and movable together to ad-' just the position to the neutral andmaximum points on the commutator-disk, substantiallyas described. of l(i. The combination, with the commutator the pins (1 or sl'iifting'devices with respect to l dislcand brushes of an electrical machine, ofthe support A B of the brush sockets or cari'neans, substantiallyasdescribed, for sirnulriers 'D consist of a screw or worm, 1?,taneouslymoving the said brushes toward and journaled in projections 37of the plate or ring A, and adapted to'be turned bya small-haml- 1multaneously adjusting the position of the wheel, 1, and a projection,Q, of the plate l1), brushes with respect to the neutral and main thesaid projection being threaded and the mum points on thecommutator-disk,substant-brcad engaging or meshing with that of the.tially as described; screw or worm A thumb-nut, t, on thelntestimonywhercofIhave hereuntosetmy end of the shaft of'scrcw I, canbe tightenec'i 5 band in the presence of two subscribing witto preventthe accidental turning of said i nesses. scrcw. On loosening the nut andtnrningthe l ZBNOBE 'lllEOllllhrl GRAMMY]. screw, the plates E E will beturned in one \Vitnesscs:

direction or the other, according to the directron in which the screw.is turned, and the EMILE BARRAL'LT, AUG. Vixen.

Mamm was Having new,fullyvdescribed-iny"said.inven-.

of the brushes with respect away l'rcni'the commutator-disks, and forsi- 1. The combination; withth'e'bru'sh sockets. I

.withbrush sockets or v

